You'd be missing out on some big $ if you decide not to make for consoles, and I wouldn't be able to play it.
They'll be missing a lot of $ when they won't release it on multiple platforms. Software piracy kills developers who still release pc-exclusive games these days. Just look at Crysis. Game developers are obligated to release there games on multiple platform, because otherwise their games just won't make enough profit due to illegal downloading and copying.
Crysis sold over a million copies, which is not bad for a very high end game that won't even play on many gamers' systems, I'd say.
I've heard complaints about piracy seriously damaging their sales, but I'm not sure such claims hold up to close scrutiny...
